validate.php

这是一个专门用来描述PHP5 OOP的电子书

<?
//Validate.php 验证类
include_once("User.php");
include_once("Properties.php");
include_once("MyException.php");

class Validate{

	public static  function validateUser(User $user){
		
		try{
			self::validateName($user->getUsername()); //用户名验证
		}catch(UsernameException $ex){
			//错误信息放入session.			
			$_SESSION[Properties::$validate_Username] = $ex->getMessage();
		}

		try{
			self::validatePassword($user->getPassword());
		}catch(PasswordException  $ex){
			//错误信息放入session.			
			$_SESSION[Properties::$validate_Password] =$ex->getMessage();
		}
		if($ex){
			//将用户名和密码放入session
			$_SESSION[Properties::$username] = $user->getUsername();
			$_SESSION[Properties::$password] = $user->getPassword();
			throw $ex; //向外抛出异常实例.
		}//如果没有异常抛出,就天下太平. 没有问题.

	}

	//验证用户名长度和是否符合正则表达式.
	//没有完全使用正则表达式,而先使用了长度判断,是为了提供更确切的错误信息.
	private static function  validateName($username){
		
		if(strlen($username) < Properties::$UsernameLengthMin){
			throw new UsernameLengthMinException(Properties::$validate_UsernameLengthMin);
		}elseif (strlen($username) > Properties::$UsernameLengthMax){
			throw new UsernameLengthMaxException(Properties::$validate_UsernameLengthMax);
		}elseif(! ereg("^[a-zA-Z0-9]*$",$username)){
			throw new UsernameInvalidateException(Properties::$validate_UsernameInfo);
		}
	}
    //验证密码.
	private static function  validatePassword($password){
		if(strlen($password) < Properties::$PasswordLengthMin){
			throw new PasswordLengthMinException(Properties::$validate_PasswordLengthMin);
		}elseif (strlen($password) > Properties::$UsernameLengthMax){
			throw new PasswordLengthMaxException(Properties::$validate_PasswordLengthMax);
		}elseif(! ereg("^[a-zA-Z0-9]*$",$password)){
			throw new PasswordInvalidateException(Properties::$validate_PasswordInfo);
		}
	}
}
?>